97117-169 - Hendrickson Trailer Suspension Maintenance ...

LIT NO: 97117-169 DATE: December 2021 REVISION: E

TECHNICAL BULLETINTRAILER SUSPENSION MAINTENANCE SCHEDULE

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TRAILER SUSPENSION MAINTENANCE SCHEDULE

INDEX97117-169 Rev E

System Technician Driver

Time/mileage, whichever occurs first. Pre-Delivery Inspection

15,000km First Inspection

15,000km(Monthly) Inspection

45,000km(3 Monthly) Inspection


Daily Visual Inspection

Tyre Pressure ControlRefer to T51002

Tyre Pressures TIREMAAX™ PRO System Pressures TIREMAAX PRO Hoses & Connections TIREMAAX PRO System & Warning Lamp

Wheel EndRefer to 97117-250

Wheel Studs & Nuts Inner Hub Seal Lubricant Leak Check Hubcap Integrity & Leaks Hub Smooth Rotation Hub Temperature – Post Operation Lubricant Level – Oil Filled Hubs Conventional Hubs – Clean, Inspect, Lubricate & Set End Play Wheel End Sensor/Monitor (where fitted) Hubodometer (where fitted)

Fixture to TrailerRefer to 97117-135

Pivot Connection

QUIK-ALIGN® Pivot Bolt TFB™ Pivot Bush Wear Washers

Hangers

Suspension SystemRefer to 97117-161

Fasteners & U-Bolts Trailing Arms Axle, Connections & Welds Axle Breather Vent Air Springs Shock Absorbers Shock Absorber Mounting & Fasteners Axle Rebound Limiter/Straps (where fitted)

UBL Lift Kit (where fitted)

Fasteners Welds Lift Bag/Leaks LACV & Pressure Regulator

SUSPENSION MAINTENANCE SCHEDULE MATRIX

LEGEND

Visual Inspection Lubrication Point Physical Check / Adjustment / Torque / Operation / Leak Check

NOTE: For further details refer to “Inspection” on page 5 & trailer torque bulletin 97117-251A. Refer to 97117-161 for a linked interactive version of this matrix.

https://aus.hendrickson-intl.com/T51002

https://aus.hendrickson-intl.com/97117-250



https://aus.hendrickson-intl.com/97117-251A


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System Technician Driver

Time/mileage, whichever occurs first. Pre-Delivery Inspection

15,000km First Inspection

15,000km(Monthly) Inspection



Daily Visual Inspection

BrakesRefer to 97117-161

Brakes General

Dust Shield Air Line Routing & Leaks ABS Sensor

Brake Chambers

Security & Fasteners Surface Damage Clamp Ring Security Clevis Assembly

Drum Brake System

Drums S-Cam S-Cam Bushes & Tube S-Cam Radial/End Play Brake Adjuster Brake Shoe Lining Anchor Pin Bushes Brake Shoe Springs

Disc Brake System

Rotor Calliper & Fasteners Brake Pads Pad Retaining Springs Running Clearances Guide Pin Cap/Adjuster Boot Guide Pins & Piston Boots

Air System

Ride Height Check Height Control Valve All Air Line Fittings Dump Valve (Where fitted)

Self-Steer AxlesRefer to Drum Brake 97117-273Disc Brake 97117-296

Tie Rod Ends & Clamps Drum Brake Kingpin Bushes & Arm Pivots Disc Brake Kingpin Bushes Lock Straight Assembly or Dampers Lock Straight Air Spring & Chamber

Suspension Overall Axle & Suspension Condition


Suspension Maintenance Schedule Matrix continued...




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SUSPENSION MAINTENANCE GUIDE

INTRODUCTION

This document recommends inspection areas and lubrication points on Hendrickson Trailer suspensions and components. The main reference is the complete “Suspension Maintenance Schedule Matrix” on page 2. An interactive version of this matrix schedule is available in 97117-161.

Each of the individual recommended services is also separated on individual service inspections, which are listed on pages 6 to 16. Also included is a recommended checklist for trailers that have been subjected to flood waters or extended idle periods.

IMPORTANT: Workshops, transport businesses and drivers need to check or service more items than are listed in this suspension service schedule. This includes things like lights, reflectors, couplings, load doors and mudflaps.

Items that need inspection will vary depending on application, such as reefer, grain tipper or live bottom. Therefore, each business is responsible to create its own suitable service and driver checklists.

PERIODIC INSPECTION SCHEDULE

IMPORTANT: This document includes minimal inspection requirements for normal on-highway applications. For trailers subjected to some off-road, abnormally rough or extreme conditions, inspection and lubrication should be adjusted to ensure maximum suspension performance and integrity. For more details refer to Hendrickson trailer suspension maintenance bulletin 97117-161.

REFERENCE DOCUMENTS

The following documents should be referenced prior to carrying out service and maintenance procedures, along with supporting information provided by relevant OEMs.

• Hendrickson Wheel End Maintenance 97117-250• Hendrickson Trailer Suspension Maintenance 97117-161

• Hendrickson CONNEX™ ST Drum Maintenance 97117-273

• Hendrickson Steerable Disc Maintenance 97117-296• Hendrickson TIREMAAX™ PRO Service T51002

• Hendrickson Trailer Torque Specifications 97117-251A• Australian National Heavy Vehicle Inspection Manual

TABLE OF CONTENTS

SUSPENSION MAINTENANCE SCHEDULE MATRIX 2

SUSPENSION MAINTENANCE GUIDE 4INTRODUCTION 4PERIODIC INSPECTION SCHEDULE 4REFERENCE DOCUMENTS 4SAFETY 5LUBRICATION POINTS 5INSPECTION 5

PRE-DELIVERY INSPECTION 6

15,000KM FIRST INSPECTION 8

15,000KM (MONTHLY) INSPECTION 10

45,000KM (QUARTERLY) INSPECTION 12

180,000KM (YEARLY) INSPECTION 14

DRIVER DAILY VISUAL INSPECTION 16

AFTER IDLE TIME OR POST-FLOOD SERVICE 17

GENERAL SAFETY INSTRUCTIONS 18









https://www.nhvr.gov.au/

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SAFETYRefer to “General Safety Instructions” on page 18.

LUBRICATION POINTSThere are few areas requiring lubrication for Hendrickson suspensions and axles. These areas include tie rod ends, kingpins (steer axle), brake adjusters, S-cam spider bushes and support bearing journal or cam tube. Each requires NLGI #2 EP chassis lubricant and should be replenished regularly.

Apply grease when components are unloaded; brakes must be released, and steer axles must be off the ground. Always apply grease until fresh lubricant appears at purge point.

INSPECTIONRecommended inspections should be conducted at periodic intervals and should also be carried out any time the suspension is damaged or otherwise functioning improperly. Refer also to ”Reference Documents” on page 4.

This schedule is based on normal on-highway average annual trailer distance of 180,000 km. Inspection intervals will need to be adapted to suit trailer distance and operating conditions. Inspections should be carried out at the time or mileage intervals specified, whichever occurs first.

Areas to Inspect

A general inspection should include any point on the suspension where suspected wear or damage may occur.

Inspection/Lubrication Intervals

Periodic intervals listed in this bulletin for inspection and lubrication should be modified according to trailer use. Inspection and lubrication may be required more often if:

• Required by OEM

• Required by component vendor

• Trailer type and application demands are high

• Impact or other evidence of suspension damage

Inspection Depth

There are only four inspection and service levels mentioned in this schedule, but inspection depth will vary depending on who and when the inspection is conducted.

For example, the daily driver inspection requires briefly checking that there are no noticeable air leaks, no components are damaged or loose and the trailer appropriate for its next trip. At a monthly service inspection, the technician will need to have a closer look at the trailer systems and components to ensure that it can safely operate until the next service. Likewise, the three-monthly and

12-monthly services each require deeper and more though inspections to ensure trouble free and safe trailer operation.

Pre-Delivery

Pre-Delivery Inspections (PDI) are typically required by the trailer OE to be conducted prior to new trailer delivery to the customer. It includes testing suspension and vehicle for proper operation. This should also be performed by a repair facility after replacing a suspension or axle/beam weldment.

Daily

This pre-operation inspection can detect worn, broken or loose parts before any serious problems occur. During a walk-around, check for any obvious problems or abnormalities.

First Service (before 15,000km)

This inspection is to be carried out after the trailer has been in service, but no later than 15,000km.

15,000km (Monthly)

This inspection is more comprehensive than the daily inspection and covers more areas. Seals, hubcap and hubcap gaskets should be checked for condition and potential leaks. This is to be carried out at 15,000km or monthly intervals, whichever occurs first.

Brake adjusters should be checked for free stroke and applied stroke. Do not manually adjust auto brake adjusters.

Steer axle tie rod ends and should be lubricated monthly, as should kingpins for disc brake steerable suspensions.

45,000km (Quarterly)

Perform quarterly inspections listed. This is to be conducted at 45,000km or quarterly intervals, whichever occurs first. Along with other checks, hubs must be inspected for smooth rotation. If the bearings feel rough, sound noisy or do not rotate freely, do not place the suspension back into service.

Brake adjuster, tie rods, kingpins, S-cam spider bush and support bearing journal or cam tubes should be greased at this time, and also during any other service when grease points are easily accessible.

180,000km (Yearly)

Perform yearly inspection as listed. This is to be carried out at 180,000km or yearly intervals, whichever occurs first.

The yearly service is similar to the 45,000km, but increases depth of service. It includes service of conventional bearings, along with other checks such as thorough TIREMAAX, brake and suspension systems inspection.

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System Technician Checked CommentsTyre Pressure ControlRefer to T51002

Tyre Pressures TIREMAAX™ PRO Hoses & Connections TIREMAAX PRO System & Warning Lamp


Wheel Studs & Nuts Hubcap Integrity & Leaks Lubricant Level – Oil Filled Hubs Hubodometer (where fitted)

Fixture to Trailer

Pivot Connection QUIK-ALIGN® Pivot Bolt Hangers


Fasteners & U-Bolts Trailing Arms Axle, Connections & Welds Air Springs Shock Absorbers Shock Absorber Mounting & Fasteners Axle Rebound Limiter/Straps (where fitted)

UBL Lift Kit (Where fitted)

Fasteners Welds Lift Bag/Leaks Pressure Regulator

PRE-DELIVERY INSPECTION

LEGEND


NOTE: For further details refer to “Inspection” on page 5 and Hendrickson trailer torque bulletin 97117-251A.





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System Technician Checked Comments


Brakes General

Dust Shield Air Line Routing & Leaks ABS Sensor

Brake Chambers

Security & Fasteners Clamp Ring Security Clevis Assembly

Drum Brake System

S-Cam S-Cam Bushes & Tube Brake Adjuster

Disc Brake System

Calliper & Fasteners Running Clearances

Air System

Ride Height Check Height Control Valve All Air Line Fittings


Tie Rod Ends & Clamps Kingpin Bushes & Centring Arm Pivots Lock Straight Assembly or Dampers Lock Straight Air Spring & Chamber


Pre-Delivery Inspection continued...





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Wheel Studs & Nuts Inner Hub Seal Lubricant Leak Check Hubcap Integrity & Leaks Hub Smooth Rotation Hub Temperature – Post Operation Lubricant Level – Oil Filled Hubs Wheel End Sensor/Monitor (where fitted) Hubodometer (where fitted)

Fixture to Trailer



Fasteners & U-Bolts Trailing Arms Axle, Connections & Welds Axle Breather Air Springs Shock Absorbers Shock Absorber Mounting & Fasteners Axle Rebound Limiter/Straps (where fitted)



15,000KM FIRST INSPECTION To be carried out no later than 15,000km

LEGEND







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Brakes General

Dust Shield Air Line Routing & Leaks ABS Sensor Mounting, Brackets & Wiring

Brake Chambers


Drum Brake System

S-Cam S-Cam Bushes & Tube Brake Adjuster

Disc Brake System

Rotor Calliper & Fasteners Pad Retaining Springs Running Clearances Guide Pin Cap/Adjuster Boot

Air System





15,000km First Inspection continued...





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Wheel Studs & Nuts Inner Hub Seal Lubricant Leak Check Hubcap Integrity & Leaks Hub Temperature – Post Operation Lubricant Level – Oil Filled Hubs Wheel End Sensor/Monitor (where fitted) Hubodometer (where fitted)

Fixture to Trailer Pivot Connection QUIK-ALIGN® Pivot Bolt

Suspension System

Fasteners & U-Bolts Air Springs Shock Absorbers Shock Absorber Mounting & Fasteners Axle Rebound Limiter/Straps (where fitted) UBL Lift Kit (Where fitted) Fasteners


Brake General


Brake Chambers


15,000KM (MONTHLY) INSPECTION 15,000km or Monthly, whichever occurs first

LEGEND







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Brakes continued...

Drum Brake System

Drums S-Cam S-Cam Bushes & Tube Brake Adjuster Brake Shoe Lining

Disc Brake System


Air SystemHeight Control Valve All Air Line Fittings


Tie Rod Ends & Clamps Drum Brake Kingpin Bushes & Centring Arm Pivots Disc Brake Kingpin Bushes Lock Straight Assembly or Dampers

15,000km (Monthly) Inspection continued...




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Wheel Studs & Nuts Inner Hub Seal Lubricant Leak Check Hubcap Integrity & Leaks Hub Smooth Rotation Hub Temperature – Post Operation Lubricant Level – Oil Filled Hubs Wheel End Sensor/Monitor (where fitted) Hubodometer (where fitted)

Fixture to Trailer

Pivot Connection


Hangers


Fasteners & U-Bolts Axle, Connections & Welds Axle Breather Air Springs Shock Absorbers Shock Absorber Mounting & Fasteners Axle Rebound Limiter/Straps (where fitted)



45,000KM (QUARTERLY) INSPECTION 45,000km or Quarterly, whichever occurs first

LEGEND







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Brakes General


Brake Chambers


Drum Brake System

Drums S-Cam S-Cam Bushes & Tube Brake Adjuster Brake Shoe Lining

Disc Brake System


Air System




45,000km (Quarterly) Inspection continued...





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Tyre Pressures TIREMAAX™ PRO System Pressures TIREMAAX PRO Hoses & Connections TIREMAAX PRO System & Warning Lamp


Wheel Studs & Nuts Inner Hub Seal Lubricant Leak Check Hubcap Integrity & Leaks Hub Smooth Rotation Hub Temperature – Post Operation Lubricant Level – Oil Filled Hubs Conventional Hubs – Clean, Inspect, Lube & Set End Play Wheel End Sensor/Monitor (where fitted) Hubodometer (where fitted)

Fixture to TrailerRefer to 97117-135

Pivot Connection


Hangers


Fasteners & U-Bolts Trailing Arms Axle, Connections & Welds Axle Breather Air Springs Shock Absorbers Shock Absorber Mounting & Fasteners Axle Rebound Limiter/Straps (where fitted)



180,000KM (YEARLY) INSPECTION 180,000km or Yearly, whichever occurs first

LEGEND








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Brakes General


Brake Chambers


Drum Brake System

Drums S-Cam S-Cam Bushes & Tube S-Cam Radial/End Play Brake Adjuster Brake Shoe Lining Anchor Pin Bushes Brake Shoe Springs

Disc Brake System


Air System

Ride Height Check Height Control Valve All Air Line Fittings Dump Valve (Where fitted)

Self-Steer AxlesRefer toDrum Brake 97117-273Disc Brake 97117-296



180,000km (Yearly) Inspection continued...





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Quick visual inspections should be conducted by the vehicle operator before leaving the depot, yard or rest area ensuring vehicles are roadworthy and safe to drive.

System Checked Comments

Tyre Pressure Control

Tyre Pressures TIREMAAX™ PRO System Tyre Pressure (where fitted) TIREMAAX PRO System & Warning Lamp (where fitted)

Wheel End

Wheel Studs & Nuts Inner Hub Seal Lubricant Leak Check Hubcap Integrity & Leaks Hub Temperature – Post Operation Lubricant Level – Oil Filled Hubs Wheel End Sensor/Monitor (where fitted) Hubodometer (where fitted)

Fixture to Trailer


Suspension System

Axle, Connections & Welds Air Springs Shock Absorbers Shock Absorber Mounting & Fasteners Steerable Suspension Tie Rod & Ends (where fitted) Axle Rebound Limiter/Straps (where fitted)

Brakes

Brakes General

Dust Shield Air Line Routing & Leaks

Brake Chambers

Security & Fasteners Surface Damage Clamp Ring Security

Air SystemHeight Control Valve All Air Line Fittings

NOTE: Refer to “Reference Documents” on page 4 and to “Inspection” on page 5 for further clarification of inspection guidelines.

DRIVER DAILY VISUAL INSPECTION

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Recommended Checks Idle Time After Flood [2] Comments

Air springs [2] Inspect while aired up at ride height.

Drum Brakes [1] [2] Air Disc Brakes [1] [2] If submerged, replace calliper assemblies, otherwise inspect for

contamination and check function.

Brakes, Brake chamber actuator [2] If submerged, replace brake chamber actuator.

Bush tubes Bush tube spacers Air line hoses, tubing, fittings, valves, etc... [2] Pests and insects will enter and nest in any small opening. Seals

and gaskets can dry and become non-functional.

Obvious signs of damage or wear Shock absorbers Refer to Hendrickson shock inspection bulletin 97117-208.

Wires, electrical connections and connectors If submerged, disassemble, clean and apply dielectric grease

during assembly.

Contamination [3] Where critical, remove all contaminants.

Lubrication Points [3] Ensure lubricant is fresh and moisture free at all grease fittings.

S-cam and cam tubes Smooth wheel bearing rotation If submerged, bearings will need to be disassembled for

inspection and replacement of lubricant, seals & gaskets.Clean, inspect & repack wheel bearings. Replace hub seals, gaskets and lubricant.

Mandatory after flood, as needed after idle. Inspect axle interior and remove any existing moisture. If any moisture present, replace spindle filter and plugs with new.

Table 1: After Idle Time & Post Flood Service RecommendationsNOTES:[1] If drum or ADB rotor contact surface is corroded following flood and being

submersed for any length of time, they must be replaced.[2] All systems should be operationally checked and tested.[3] Replacing lubricant purges any collected moisture and/or degraded lubricant.

AFTER IDLE TIME OR POST-FLOOD SERVICEIf there is any doubt about the serviceability of any components, then it is best to disassemble, analyse and inspect to avoid costly breakdowns or component failure. Refer to Table 1.

Idle Time

Trailer suspensions not operated (idle) for prolonged periods of time must be inspected prior to renewed operation or production installation (e.g. Manufacturing outside storage, trailer used for storage at dock or in parking areas, etc.).

Normally, machined surfaces (bearing races, bearings, etc.) are protected by lubrications flowing onto, over and around during use. Lack of trailer motion causes lubricants to flow downward and away from these surfaces until it reaches a level pool in the hub. Metal surfaces are eventually unprotected and exposed to the environment. Seals and gaskets not exposed to lubricant can degrade in

performance. Check and replace as needed.

Surface cracks on rubber components do not normally affect performance.

Flood

Oil and water do not mix. Lubricants continue to seek a level state, even while under water. All metal surfaces, wires and materials that are directly exposed to moisture, pollutants and other contaminants can lead to rust and corrosion.

CAUTION: Flood waters are often contaminated with bacteria or other organisms that may be harmful to human health. Wear gloves and other necessary safety equipment when working on trucks or trailers that have been affected by flood. Any waste such as water, tainted grease or sludge must also be managed and disposed of appropriately.

LEGEND

V Visual Inspection

Lubrication Point

Physical Check / Adjustment / Torque / Operation / Leak Check



97117-169 Rev E

www.hendrickson.com.au

Need Help? Call 03 8792 3600 or Email [email protected]

Printed in AustraliaInformation contained in this literature was accurate at the time of publication. Product changes may have been made after the copyright date that are not reflected. © 2007 – 2021 Hendrickson USA, L.L.C. All Rights Reserved

HENDRICKSON ASIA PACIFIC PTY LTDABN 21 004 992 76932- 44 Letcon Drive, P.O. Box 1063Dandenong, Victoria, 317561.3.8792.3600 • Fax 61.3.8792.3699

HENDRICKSON NEW ZEALANDUnit P, 24 Allright PlaceMt Wellington, Auckland, 106064.9.570.4721 • Fax 64.9.570.4816

Actual product performance may vary depending upon vehicle configuration, operation, service and other factors.All applications must comply with applicable Hendrickson specifications and must be approved by the respective vehicle manufacturer with the vehicle in its original, as-built configuration.

Contact Hendrickson for additional details regarding specifications, applications, capacities, and operation, service and maintenance instructions.

All trademarks shown are owned by Hendrickson USA, L.L.C., or one of its affiliates, in one or more countries.

Revisions Table

DATE REV PAGE DESCRIPTIONFeb-2021 D All New expanded and updated format.

Dec-2021 E All Add disc steerable suspension.

WARNING: Follow recommended safety practices when working on heavy vehicles and trailers. Always wear proper eye protection and other required PPE (personal protective equipment) when performing vehicle maintenance, repair or service.

GENERAL SAFETY INSTRUCTIONS NOTICE: Safety working advice is contained

in Hendrickson Trailer Suspension Maintenance 97117-161. Further recommendations are further detailed by relevant truck and trailer OEM documentation.

Please refer also to the recommendations of the workplace safety authority in your country, state, territory or municipality for detailed recommendations and advice on regulations that may also apply.

Disclaimer: This publication is distributed with the understanding that the authors, editors and publishers are not responsible for the results of any actions or works of whatsoever kind based on the information contained in this publication, nor for any errors or omissions contained herein. The publishers, authors and editors expressly disclaim all and any liability to any person whomsoever in respect of the consequences of anything done or omitted to be done by any such person in reliance, whether whole or partial upon the whole or any part of the contents of this publication.

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